Age-stage, two-sex life table of Amblyseius herbicolus at different temperatures
Author of the article:NI Zhao-Hong, HOU Fei, ZOU Meng-Ting, GUO Jian-Jun
Author's Workplace:Institute of Entomology, Guizhou University
Key Words:Amblyseius herbicolus, temperature, age-stage two-sex life table
Abstract:
[Objectives] To clarify the effects of different temperatures on the population growth of Amblyseius herbicolus (Chant) feeding on Oulenzia bakeri (Hughes). [Methods] An age-stage, two-sex life table was used to determine the developmental period, survival rate, fecundity and population parameters, under five temperatures (19, 22, 25, 28, 31 ℃), 85%±5% RH and a 16︰8 h (L︰D) photoperiod. [Results] The preadult and preoviposition periods first shortened, then lengthened with increasing temperature within the range of 19 to 28 ℃. These periods were shortest at 25 ℃ (5.4 and 2.2 d, respectively). The oviposition period, fecundity, intrinsic rate of increase (r), finite rate of increase (λ) and net reproductive value (R0), first increased, then decreased, with temperature, and were highest at 25 ℃ (12.6 d, 26.0 eggs/female, 0.2 d﹣1, 1.2 d﹣1, 12.5, respectively). All measured population parameters decreased significantly at temperatures > 25 ℃. [Conclusion] Although A. herbicolus can complete its growth and reproduction at temperatures in the range of 19 to 31 ℃, 25 ℃ is the optimal temperature within this range for breeding this species in captivity.